This week in physics we are finishing unit 2 on kinematics. In class we learned about velocity, gravity and acceleration. Velocity is defined as the rate and direction of change in the position of an object. Acceleration is the rate of change of velocity. In class we learned many different examples, like a "spam sandwich falling from a 200m deep well", in this case this is my brother throwing a football up in the air. The ball is a little less than 10m high. Kinematics helps us find how hard he had to throw the ball in order for it to reach that height. At this position in the picture the ball was just at its slowest moving point in the air and starts to fall down. We learned that the cycle of the ball flight starts fast, then slows, then stops, then slow back down, fast, and stops back from where it took off. Gravity is always on, its constantly holding us on earth and pushing objects in the air back down, that is why the ball thrown in the air comes to a complete stop for just a little while. The gravity is always constant, its the velocity that varies throughout the flight of the ball. This is a good example of physics and it shows how kinematics can relate to something you see everyday.
